﻿<!DOCTYPE html>
<html>
<head>
  <title>Tool for Reshaping a Sector of a Circle</title>
  <!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
  <meta name="description" content="TypeScript: A demonstration of the SectorReshapingTool extension." />
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
</head>
<body>
  <div id="sample">
    <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
    <p>
      Two of the handles permit changing the angles of the sector; one handle permits changing the radius of the sector.
    </p>
    <p>
      Note that the <a>Geometry</a> returned by <code>makeSector</code> always returns a Geometry that
      occupies the area that would be occupied by a full circle.  That Geometry-creating function also
      depends on three data properties, <code>radius</code>, <code>angle</code>, and <code>sweep</code>.
    </p>
  </div>

  <script type="module" id="code">
    import * as go from "../release/go-module.js";
    import { SectorReshapingTool } from './SectorReshapingTool.js';

    if (window.goSamples) goSamples(); // init for the samples -- you don't need to call this
    const $ = go.GraphObject.make;

    const myDiagram = $(go.Diagram, 'myDiagramDiv', {
      'animationManager.isEnabled': false,
      'undoManager.isEnabled': true
    });

    // install the SectorReshapingTool as a mouse-down tool
    myDiagram.toolManager.mouseDownTools.add(new SectorReshapingTool());

    function makeSector(data) {
      const radius = SectorReshapingTool.getRadius(data);
      const angle = SectorReshapingTool.getAngle(data);
      const sweep = SectorReshapingTool.getSweep(data);
      const start = new go.Point(radius, 0).rotate(angle);
      // this is much more efficient than calling go.GraphObject.make:
      const geo = new go.Geometry()
        .add(new go.PathFigure(radius + start.x, radius + start.y) // start point
          .add(new go.PathSegment(go.PathSegment.Arc, angle, sweep, // angles
            radius, radius, // center
            radius, radius)) // radius
          .add(new go.PathSegment(go.PathSegment.Line, radius, radius).close()))
        .add(new go.PathFigure(0, 0)) // make sure the Geometry always includes the whole circle
        .add(new go.PathFigure(2 * radius, 2 * radius)); // even if only a small sector is "lit"
      return geo;
    }

    myDiagram.nodeTemplate =
      $(go.Node, 'Spot',
        {
          locationSpot: go.Spot.Center, locationObjectName: 'LAMP',
          selectionObjectName: 'LAMP', selectionAdorned: false
        },
        new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify),
        // selecting a Node brings it forward in the z-order
        new go.Binding('layerName', 'isSelected', (s) => s ? 'Foreground' : '').ofObject(),
        $(go.Panel, 'Spot', { name: 'LAMP' },
          $(go.Shape, // arc
            { fill: 'yellow', stroke: 'lightgray', strokeWidth: 0.5 },
            new go.Binding('geometry', '', makeSector)),
          $(go.Shape, 'Circle', { name: 'SHAPE', width: 6, height: 6 })),
        $(go.TextBlock,
          {
            alignment: new go.Spot(0.5, 0.5, 0, 3), alignmentFocus: go.Spot.Top,
            stroke: 'blue', background: 'rgba(255,255,255,0.3)'
          },
          new go.Binding('alignment', 'spot', go.Spot.parse).makeTwoWay(go.Spot.stringify),
          new go.Binding('text', 'name'))
      );

    myDiagram.model = new go.GraphLinksModel([
      { name: 'Alpha', radius: 70, sweep: 120 },
      { name: 'Beta', radius: 70, sweep: 80, angle: 200 }
    ]);
    myDiagram.commandHandler.selectAll(); // to show the tool handles

    window.myDiagram = myDiagram; // Attach to the window for console debugging
  </script>
</body>
</html>